The diagrams given below are cross sections of blood vessels:

(i) Identify the blood vessels A, B and C.

(ii) Name the parts labelled 1 to 3.

(iii) Name the type of blood that flows through A.

(iv) Mention one structural difference between A and B.

(v) In which of the above vessels does exchange of gases actually take place?

Differentiate between the following pairs on the basis of what is mentioned within brackets:

Diffusion and Osmosis (Definition)

Differentiate between the following pairs on the basis of what is mentioned within brackets:

Vasopressin and Insulin (Deficiency disorder)

Differentiate between the following pairs on the basis of what is mentioned within brackets:

Tubectomy and Vasectomy (Part cut and tied)